JPWO2016203521A1 - Reamer - Google Patents

Abstract

The insert part (3) of the reamer (1) is fixed to the tip of the body (2A) with a screw (8). The insert part (3) is formed by superposing the insert (4) for finishing and the insert (5) for roughing, and forms a right-handed right twist. At each mating surface of the insert (4, 5), the convex portion and the concave portion of the mating surface of the insert (4) are overlapped with the concave portion and the convex portion of the mating surface of the insert (5). The reamer (1) can enlarge the hole formed in the workpiece or change the shape. Since the inner peripheral surface of the hole is simultaneously cut with the inserts (4, 5), roughing and finishing can be performed in one pass. The inserts (4, 5) partially overlap each other in the thickness direction because the convex portions and concave portions of the mating surfaces overlap each other. Therefore, the protrusion length of the insert part (3) can be shortened.

Description

  The present invention relates to a reamer including a body and an insert portion attached to the body.

  There has been proposed a machining head exchangeable rotary tool in which a holder and a machining head are integrally coupled with a fastening male screw and a fastening female screw (for example, see Patent Document 1).

JP 2010-284552 A

  The machining head exchangeable rotary tool described in Patent Document 1 has a problem that the usage is limited by the shape of the holder. In addition, the machining head exchangeable rotary tool can use machining heads of various shapes, but since the number of machining heads that can be mounted is one, for example, complex machining such as roughing and finishing can be performed simultaneously. There wasn't.

  An object of the present invention is to provide a reamer that can be applied to various uses and can be combined.

  According to an aspect of the present invention, there is provided a reamer comprising a columnar body, a disc-shaped insert portion, and a fixing means for removably fixing the insert portion to one axial end portion of the body, The insert part can be constituted by a single disk-like insert having a blade part provided with a right blade or a left blade torsional blade on the side surface, or a plurality of sheets stacked on the same axis. The insert is formed on each of both surfaces so as to protrude from the center in the thickness direction of the insert to both sides in the thickness direction, and is provided in a portion excluding the convex portion and the convex portion that is the farthest from the center, A first insert which is formed so as to protrude from the center on both sides in the thickness direction and has a recess which is lower than the protrusion, and which overlaps each other when the plurality of inserts are coaxially overlapped with each other. And in each mating surface of the second insert, the convex portion provided on the mating surface of the first insert is inserted into the concave portion provided on the mating surface of the second insert, The insert-type tool is provided, wherein the convex portion provided on the mating surface of the second insert is inserted into the concave portion provided on the mating surface of the first insert. .

  In the reamer of this aspect, the reamer can be constructed by superimposing a plurality of inserts on the same axis. Thereby, a plurality of different types of processing can be performed at a time. Moreover, since the length of a blade part can be changed by changing the combination of inserts, combined processing becomes possible. Moreover, since the thickness of the insert is the thickest portion in the insert, it is the sum of the thickness of the convex portions and the convex portions provided on both sides. In each of the mating surfaces of the first insert and the second insert that are overlapped with each other, the first insert-side convex portion is inserted into the second insert-side concave portion, and the second insert-side convex portion is the first insert-side convex portion. Therefore, the first insert and the second insert partially overlap each other in the thickness direction. That is, the total thickness of the insert portion formed by overlapping the first insert and the second insert is smaller than the total thickness of the first insert and the second insert as a single unit. Thereby, since the protrusion length of the insert part in the axial direction of a reamer can be shortened, while being able to improve tool rigidity, the shake | fluctuation at the time of rotation can be suppressed.

The said convex part of this aspect may be provided between the said blade part and the center part of the said insert. Since this aspect arrange | positions the convex part with thickness among inserts corresponding to the blade part provided in the outer periphery of insert, the rigidity of the outer peripheral part of the insert which supports a blade part can be improved.

  A shaft hole penetrating in the thickness direction is provided in the center portion of the insert of this aspect, and a contact surface in contact with one side of the insert is provided in the one end portion of the body. A boss that projects along the axial direction of the body and is inserted into the shaft hole may be provided at the center. When the insert is fixed to one end of the body, the shaft hole of the insert is inserted into the boss on the body side, and is fixed with a fixing means in a state where one side of the insert is in contact with the contact surface on the body side. Thereby, since it becomes easy to position an insert with respect to the one end part of a body, the fixing operation | work of the insert to a body can be performed efficiently.

  The contact surface of this aspect is provided at the position corresponding to the concave portion provided on the one surface so as to protrude to the one surface side, and is provided on the one surface with the body side convex portion inserted into the concave portion. In addition, a body-side concave portion that is provided lower than the body-side convex portion and allows the convex portion to be inserted inside may be provided at a position corresponding to the convex portion. When the one surface of the insert is brought into contact with the contact surface, the convex portion provided on the one surface of the insert can be inserted into the body-side concave portion provided on the contact surface. Thereby, this aspect can further shorten the protrusion length of the insert portion.

  The fixing means of this aspect is a screw, and the insert is provided with an insertion hole that penetrates in the thickness direction and inserts a shaft portion of the screw, and corresponds to the insertion hole on the contact surface. A screw hole for fastening the screw may be provided at the position. Thereby, this aspect can fix an insert to a body firmly.

In each of both surfaces of the insert of the present aspect, the number of the convex portions and the number of the concave portions are the same n, and contacts the outermost peripheral edge portion of the convex portion from the center portion of the insert, and the convex portions X is the minimum angle indicated by the two first imaginary straight lines when all the parts are included in between, and the convex part is provided between the two second imaginary straight lines that are in contact with the outermost peripheral edge of the concave part from the central part. Assuming that the maximum angle when not including Y is X, X <Y, the sum of X of each of the n convex portions is less than 180 °, and the sum of Y of each of the n concave portions is 180. The maximum angle X _max of each X of the n convex portions is less than 180 / n, and the maximum angle Y _max of each Y of the n concave portions is larger than 180 / n. It may be made to become. Thereby, the convex part and recessed part provided in each of both surfaces of the insert can overlap with the concave part and convex part of the other insert even if the insert is turned upside down.

The number of the body-side convex portions and the number of the body-side concave portions provided on the contact surface of this aspect are n, which is the same as the number of the convex portions and the number of the concave portions,
The minimum angle indicated by two third imaginary straight lines when contacting the outermost peripheral edge portion of the body side convex portion from the center portion of the contact surface and including all the body side convex portions therebetween is x, the center X = X, y = Y, where y is the maximum angle when the body-side convex portion is not included between the two fourth virtual straight lines that contact the outermost peripheral edge portion of the body-side concave portion from the portion There may be. As a result, the front and back of the insert can be attached to the contact surface of the body. For example, if the insert with the “right blade right twist” is turned over and attached to the body, the “left blade right twist” will result. The direction can be changed according to the situation

  A tip end portion of the convex portion provided on the mating surface of the first insert of this aspect is in contact with a bottom portion of the concave portion provided on the mating surface of the second insert, and the mating of the second insert is performed. You may make it the front-end | tip part of the said convex part provided in the surface not contact with the bottom part of the said recessed part provided in the said mating surface of a said 1st insert. Thereby, since this aspect can superimpose the mating surface of a 1st insert and the mating surface of a 2nd insert in parallel without rattling, the thickness of the insert part comprised by several insert can be made uniform.

  In each of both surfaces of the insert of this aspect, the insert part is a roughing insert that is the insert having a roughing blade part, and a finishing insert that is the insert having a finishing blade part. May be configured to overlap each other on the same axis. Thereby, this aspect can perform the composite process which performs a roughing process and a finishing process simultaneously on a workpiece | work.

1 is an overall perspective view of a reamer 1. FIG. It is a perspective view of the insert 4. FIG. FIG. 6 is a plan view of the insert 4. 4 is a side view of the insert 4. FIG. It is a perspective view of the insert 5. FIG. FIG. 6 is a plan view of the insert 5. It is an insert 5 side view. It is a figure which shows the method of overlapping the inserts 4 and 5 and creating the insert part 3. FIG. It is the figure which looked at the insert part 3 from the insert 4 side. 3 is a side view of the insert 130. FIG. It is a top view of the insert part 130. FIG. It is a partial expansion perspective view of the front end side of body 2A. It is an end view of the front end side of the body 2A. It is a partial expansion perspective view of the front end side of body 2B. It is an end view of the front end side of the body 2B. It is a figure which shows the state which accumulated the insert 5 on the attachment surface 90 of the body 2A. It is a figure which shows the state which accumulated the insert 4 on the attachment surface 190 of the body 2B. FIG. 3 is a partially enlarged perspective view of the reamer 100 on the tip side. FIG. 3 is a partially enlarged perspective view of the reamer 200 on the tip side. 3 is a conceptual diagram showing a processing method by a reamer 100. FIG. 3 is a conceptual diagram showing a processing method by a reamer 200. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the specific structure of embodiment described below at all.

  The structure of the reamer 1 will be described with reference to FIG. The reamer 1 is a tool for enlarging a hole drilled in a workpiece such as a metal plate or adjusting the shape. The reamer 1 is an insert-type tool with a right-handed right-handed twist, and includes a substantially cylindrical body 2A and an insert portion 3 that is detachably fixed to a distal end portion (one axial end portion) of the body 2A. The body 2A is a shank that is attached to a spindle or the like of a machine tool (not shown) and is driven to rotate. As the material of the body 2A, for example, carbon steel, alloy steel, or the like, which has lower wear resistance, hardness, strength, and the like compared to the inserts 4 and 5 that will be described later that constitute the insert portion 3, can be employed.

  The insert part 3 is detachably fixed with four screws 8 to the tip part of the body 2A. The insert portion 3 is configured by superimposing one or a plurality of disc-shaped inserts on the same axis. The insert portion 3 shown in FIG. 1 is configured by overlapping two inserts 4 and 5 on the same axis. The inserts 4 and 5 are formed of a predetermined material such as cemented carbide, high-speed tool steel, or ceramic. If necessary, a hard coating such as a compound coating such as TiN, TiCN, TiAlN, or CrN, a DLC (Diamond Like Carbon) film, or a diamond coating may be coated. You may give it.

  As the inserts 4 and 5, for example, different inserts can be used. The insert 4 is for finishing and the insert 5 is for roughing. The insert portion 3 includes the insert 4 on the front end side in the axial direction and the insert 5 on the rear end side in the axial direction. The reamer 1 can perform combined processing for performing roughing and finishing simultaneously in one pass.

  The structure of the insert 4 will be specifically described with reference to FIGS. 4 is a side view when the insert 4 shown in FIG. 3 is viewed from the direction of the arrow D1. As shown in FIGS. 2 and 3, the insert 4 includes an insert body 10 and eight blade portions 11 to 18. Since the insert 4 is for finishing, the diameter thereof is smaller than that of a roughing insert 5 described later. The insert main body 10 is formed in a substantially disk shape having a predetermined thickness, and includes one surface 10A and another surface 10B (see FIG. 4). The insert body 10 includes a shaft hole 41 and four insertion holes 43 to 46. The shaft hole 41 is provided at the center of the insert body 10 and penetrates the one surface 10A and the other surface 10B. A boss 111 (see FIG. 12), which will be described later, provided at the tip of the body 2A is inserted into the shaft hole 41. The four insertion holes 43 to 46 are respectively arranged in the cross direction around the shaft hole 41, and are provided at positions corresponding to blade parts 12, 14, 16, and 18 to be described later. Four screws 8 (see FIG. 1) are inserted into these insertion holes 43 to 46.

  The blade portions 11 to 18 are provided at equal intervals in the circumferential direction at the outer peripheral edge portion of the insert body 10. For convenience of explanation, it is assumed that the blade portions 11 to 18 are sequentially arranged in the clockwise direction when the insert body 10 is viewed from the one surface 10A. The blade portions 11 to 18 protrude outward in the radial direction and are formed in a right-handed twist. The blade edges 11A to 18A of the blade portions 11 to 18 are respectively arranged on the left side in the circumferential direction when viewed from the one surface 10A side (the right side in the circumferential direction when viewed from the other surface 10B).

  Next, the surface shape of the insert body 10 will be described. The one surface 10A and the other surface 10B are provided with eight substantially fan-shaped convex portions 21 to 28, eight substantially fan-shaped concave portions 31 to 38, and an annular concave portion 39, respectively. On each of the one surface 10A and the other surface 10B, the convex portions 21 to 28 are provided at positions corresponding to the blade portions 11 to 18, respectively. The convex portion 21 is provided between the blade portion 11 and the shaft hole 41 so as to protrude in the thickness direction of the insert main body 10, and is tapered from the base portion of the blade portion 11 toward the shaft hole 41 side. The convex portion 22 is provided between the blade portion 12 and the insertion hole 43 so as to protrude in the thickness direction of the insert body 10 and is tapered from the base portion of the blade portion 12 toward the insertion hole 43 side.

  Similarly to the convex portion 21, the convex portions 23, 25, 27 are provided between the blade portions 13, 15, 17 and the shaft hole 41 so as to protrude in the thickness direction of the insert body 10, and the blade portions 13, 15, It is tapered from the base of 17 toward the shaft hole 41 side. Similarly to the convex portion 22, the convex portions 24, 26, 28 are provided between the insertion holes 44, 45, 46 and the blade portions 14, 16, 18 so as to protrude in the thickness direction of the insert body 10. The blade portions 14, 16, 18 are tapered from the respective base portions toward the insertion holes 44, 45, 46 side.

  On one surface 10 </ b> A and the other surface 10 </ b> B, the concave portions 31 to 38 are provided between the convex portions 21 to 28, except for the convex portions 21 to 28, and the convex portions 21 to 28 in the thickness direction of the insert body 10. It is formed lower than 28. The concave portion 31 is provided between the convex portions 21 and 22 and is tapered from the outer peripheral edge portion of the insert body 10 toward the shaft hole 41 side. And like the recessed part 31, the recessed part 32 is provided between the convex parts 22 and 23, the recessed part 33 is provided between the convex parts 23 and 24, and the recessed part 34 is provided between the convex parts 24 and 25. The concave portion 35 is provided between the convex portions 25 and 26, the concave portion 36 is provided between the convex portions 26 and 27, the concave portion 37 is provided between the convex portions 27 and 28, and the concave portion 38. Are provided between the convex portions 28 and 21 and are respectively tapered from the outer peripheral edge portion of the insert body 10 toward the shaft hole 41 side. The annular recess 39 is formed annularly along the outer peripheral edge of the shaft hole 41 and lower than the projections 21 to 28, and is connected to the end of each of the recesses 31 to 38 on the shaft hole 41 side. The annular recess 39 and the recesses 31 to 38 are flush with each other. As shown in FIG. 4, the convex portions 21 to 28 and the concave portions 31 to 38 provided on the one surface 10A and the convex portions 21 to 28 and the concave portions 31 to 38 provided on the other surface 10B are the thickness of the insert 10 main body. They are arranged at the same position in the direction.

  As shown in FIG. 4, in the insert 4 having the above structure, the length from the center in the thickness direction of the insert body 10 to the tip portions of the convex portions 21 to 28 on the one surface 10A side is M1, and the convexity on the other surface 10B side The length from the center in the thickness direction of the insert body 10 to the bottom of each recess 31-38 on the one surface 10A side is N1, the center in the thickness direction of the insert body 10 To N2 is a length from each of the concave portions 31 to 38 on the other surface 10B side. Since the thickness L1 of the insert 4 is a length from the convex portions 21 to 28 on the one surface 10A side to the convex portions 21 to 28 on the other surface 10B side, it is a length obtained by adding M1 and M2. At this time, the insert 4 can be applied to any of M1 = M2, M1> M2, M1 <M2, N1 = N2, N1> N2, and N1 <N2.

  The structure of the insert 5 will be specifically described with reference to FIGS. FIG. 7 is a side view when the insert 5 shown in FIG. 6 is viewed from the direction of the arrow D3. As shown in FIGS. 5 and 6, the insert 5 includes an insert body 50 and eight blade portions 51 to 58. The insert body 50 is formed in a substantially disk shape having a predetermined thickness, and includes one surface 50A and another surface 50B (see FIG. 7). The insert body 50 includes a shaft hole 81 and four insertion holes 83 to 86. The shaft hole 81 is provided at the center of the insert body 50 and penetrates the one surface 50A and the other surface 50B. A boss 111 (see FIG. 12), which will be described later, provided at the tip of the body 2A is inserted into the shaft hole 81. The four insertion holes 83 to 86 are arranged in the cross direction around the shaft hole 81, respectively, between the blade portions 51 and 52, between the blade portions 53 and 54, between the blade portions 55 and 56, and the blade portion 57. And 58 are provided at corresponding positions. Four screws 8 (see FIG. 1) are inserted into these insertion holes 83 to 86.

  The blade parts 51 to 58 are provided at equal intervals in the circumferential direction at the outer peripheral edge part of the insert body 50. For convenience of explanation, it is assumed that the blade portions 51 to 58 are sequentially arranged clockwise when the insert body 50 is viewed from the one surface 50A. The blade parts 51 to 58 protrude outward in the radial direction and are formed in a right-handed twist. The blade edges 51A to 58A of the blade portions 51 to 58 are respectively arranged on the left side in the circumferential direction when viewed from the one surface 50A side (the right side in the circumferential direction when viewed from the other surface 50B).

  Next, the surface shape of the insert body 50 will be described. On the one surface 50A and the other surface 50B, eight substantially fan-shaped convex portions 61 to 68, eight substantially fan-shaped concave portions 71 to 78, and an annular concave portion 79 are provided, respectively. On each of the one surface 50A and the other surface 50B, the convex portions 61 to 68 are provided at positions corresponding to the blade portions 51 to 58, respectively. The convex portion 61 is provided between the blade portion 51 and the shaft hole 81 so as to protrude in the thickness direction of the insert body 50 and is tapered from the base portion of the blade portion 51 toward the shaft hole 81 side. A portion overlapping the insertion hole 83 of the convex portion 61 is formed to be curved along the outer edge portion of the insertion hole 83 that is curved. The convex portion 62 is provided between the blade portion 52 and the shaft hole 81 so as to protrude in the thickness direction of the insert body 50 and is tapered from the base portion of the blade portion 52 toward the shaft hole 81 side. A portion overlapping the insertion hole 83 of the convex portion 62 is formed by being curved along the outer edge portion where the insertion hole 83 is curved.

  Similar to the convex portions 61 and 62, the convex portions 63 and 64 are provided between the blade portions 53 and 54 and the shaft hole 81 so as to protrude in the thickness direction of the insert body 50, and the base portions of the blade portions 53 and 54. It is formed to taper from the shaft hole 81 toward the shaft hole 81. Portions overlapping the insertion holes 84 of the convex portions 63 and 64 are formed to be curved along the outer edge portions of the insertion holes 84 that are curved. The convex portions 65 and 66 are provided between the blade portions 55 and 56 and the shaft hole 81 so as to protrude in the thickness direction of the insert body 50 and are tapered from the base portion of the blade portions 55 and 56 toward the shaft hole 81 side. Has been. The portions overlapping the insertion holes 85 of the convex portions 65 and 66 are formed to be curved along outer curved edge portions of the insertion holes 85. The convex portions 67 and 68 are provided between the blade portions 57 and 58 and the shaft hole 81 so as to protrude in the thickness direction of the insert body 50, and are tapered from the base portion of the blade portions 57 and 58 toward the shaft hole 81. ing. Portions overlapping the insertion holes 86 of the convex portions 67 and 68 are formed to be curved along outer curved edge portions of the insertion holes 86.

  On one surface 50 </ b> A and the other surface 50 </ b> B, the concave portions 71 to 78 are provided between the convex portions 61 to 68 except for the convex portions 61 to 68, and in the thickness direction of the insert body 50, the convex portions 61 to 68 are provided. It is formed lower than 68. The concave portion 71 is provided between the convex portions 61 and 62, the concave portion 72 is provided between the convex portions 62 and 63, the concave portion 73 is provided between the convex portions 63 and 64, and the concave portion 74 is convex. The concave portion 75 is provided between the convex portions 65 and 66, the concave portion 76 is provided between the convex portions 66 and 67, and the concave portion 77 is provided between the convex portions 67 and 68. The concave portion 78 is provided between the convex portions 68 and 61. The recesses 71 to 78 are each tapered from the outer peripheral edge of the insert body 50 toward the shaft hole 81 side.

  The insertion holes 83 to 86 are provided on the shaft hole 81 side of the recesses 71, 73, 75, and 77. The annular recess 79 is formed annularly along the outer peripheral edge of the shaft hole 81 and lower than the projections 61 to 68 and is connected to the end of each of the recesses 71 to 78 on the shaft hole 81 side. The annular recess 79 and the recesses 71 to 78 are flush with each other. As shown in FIG. 7, the convex portions 61 to 68 and the concave portions 71 to 78 provided on the one surface 50 </ b> A, and the convex portions 61 to 68 and the concave portions 71 to 78 provided on the other surface 50 </ b> B are the thickness of the insert body 50. They are arranged at the same position in the direction.

  In the insert 5 having the above-described structure, the length from the center in the thickness direction of the insert body 50 to each tip of the convex portions 61 to 68 on the one surface 50A side is M3, and each tip of the convex portions 61 to 68 on the other surface 50B side The length from the center in the thickness direction of the insert body 50 to the bottom of each recess 71 to 78 on the one surface 50A side is N3, the recess from the center in the thickness direction of the insert body 50 to the other surface 50B side. The length to each bottom part of 71-78 is set to N4. Since the thickness L2 of the insert 5 is the length from the convex portions 61 to 68 on the one surface 50A side to the convex portions 61 to 68 on the other surface 50B side, it is a length obtained by adding M3 and M4. At this time, the insert 5 can be applied to any of M3 = M4, M3> M4, M3 <M4, N3 = N4, N3> N4, and N3 <N4.

  With reference to FIGS. 8 and 9, a method of creating the insert portion 3 by superimposing the inserts 4 and 5 will be described. In addition, the insert 4 shown in FIG. 8 shows a side surface when the insert 4 of FIG. 3 is viewed from the direction of the arrow D2. The insert 5 shown in FIG. 8 shows a side surface when the insert 5 of FIG. 6 is viewed from the direction of the arrow D4. In FIG. 9, the insert 5 is indicated by a solid line, and the insert 4 is indicated by a two-dot chain line.

  As shown in FIG. 8, for example, the other surface 10B of the insert 4 and the one surface 50A of the insert 5 are opposed to each other and overlap each other. At this time, the other surface 10B and the one surface 50A become the mating surfaces.

  As shown in FIGS. 8 and 9, the convex portion 21 provided on the other surface 10B is inserted into the concave portion 78 provided on the one surface 50A. The convex portion 22 provided on the other surface 10B is inserted into the concave portion 71 provided on the one surface 50A. The convex portion 23 provided on the other surface 10B is inserted into the concave portion 72 provided on the one surface 50A. The convex portion 24 provided on the other surface 10B is inserted into the concave portion 73 provided on the one surface 50A. The convex portion 25 provided on the other surface 10B is inserted into the concave portion 74 provided on the one surface 50A. The convex portion 26 provided on the other surface 10B is inserted into the concave portion 75 provided on the one surface 50A. The convex portion 27 provided on the other surface 10B is inserted into the concave portion 76 provided on the one surface 50A. The convex portion 28 provided on the other surface 10B is inserted into the concave portion 77 provided on the one surface 50A.

  On the other hand, the convex portion 61 provided on the one surface 50A is inserted into the concave portion 31 provided on the other surface 10B. The convex portion 62 provided on the one surface 50A is inserted into the concave portion 32 provided on the other surface 10B. The convex portion 63 provided on the one surface 50A is inserted into the concave portion 33 provided on the other surface 10B. The convex portion 64 provided on the one surface 50A is inserted into the concave portion 34 provided on the other surface 10B. The convex portion 65 provided on the one surface 50A is inserted into the concave portion 35 provided on the other surface 10B. The convex portion 66 provided on the one surface 50A is inserted into the concave portion 36 provided on the other surface 10B. The convex portion 67 provided on the one surface 50A is inserted into the concave portion 37 provided on the other surface 10B. The convex portion 68 provided on the one surface 50A is inserted into the concave portion 38 provided on the other surface 10B. In this way, the inserts 4 and 5 are coaxially overlapped with each other to form the insert portion 3. As shown in FIGS. 1 and 8, in this insert portion 3, the blade portions 11 to 18 of the insert 4 and the blade portions 51 to 58 of the insert 5 partially overlap each other in the axial direction. The inner peripheral surface can be continuously cut.

  Here, in the insert part 3, the tip part of the convex part 21 provided on the other surface 10B comes into contact with the bottom part of the concave part 78 provided on the one surface 50A. The tip of the convex portion 22 provided on the other surface 10B comes into contact with the bottom of the concave portion 71 provided on the one surface 50A. The tip of the convex portion 23 provided on the other surface 10B comes into contact with the bottom of the concave portion 72 provided on the one surface 50A. The tip of the convex portion 24 provided on the other surface 10B comes into contact with the bottom of the concave portion 73 provided on the one surface 50A. The tip of the convex portion 25 provided on the other surface 10B comes into contact with the bottom of the concave portion 74 provided on the one surface 50A. The tip of the convex portion 26 provided on the other surface 10B comes into contact with the bottom of the concave portion 75 provided on the one surface 50A. The tip of the convex portion 27 provided on the other surface 10B comes into contact with the bottom of the concave portion 76 provided on the one surface 50A. The tip of the convex portion 28 provided on the other surface 10B comes into contact with the bottom of the concave portion 77 provided on the one surface 50A.

  On the other hand, the tip of the convex portion 61 provided on the other surface 50B faces the bottom of the concave portion 31 provided on the one surface 50A with a gap. The tip of the convex portion 62 provided on the other surface 50B is opposed to the bottom of the concave portion 32 provided on the one surface 50A with a gap, and the tip of the convex portion 63 provided on the other surface 50B is It faces the bottom of the recess 33 provided on the one surface 50A with a gap. The tip of the convex portion 64 provided on the other surface 50B is opposed to the bottom of the concave portion 34 provided on the one surface 50A with a gap. The tip of the convex portion 65 provided on the other surface 50B faces the bottom of the concave portion 35 provided on the one surface 50A with a gap. The tip of the protrusion 66 provided on the other surface 50B faces the bottom of the recess 36 provided on the one surface 50A with a gap. The tip of the protrusion 67 provided on the other surface 50B faces the bottom of the recess 37 provided on the one surface 50A with a gap. The tip of the convex portion 68 provided on the other surface 50B faces the bottom of the concave portion 38 provided on the one surface 50A with a gap.

  As shown in FIG. 8, the thickness L3 of the insert portion 3 is such that the tip portions of the convex portions 21 to 28 provided on the one surface 10A of the insert 4 and the convex portions 61 to 68 provided on the other surface 50B of the insert 5. It corresponds to the distance between each tip. Then, as described above, the convex portions and the concave portions of the other surface 10B and the one surface 50A are overlapped with each other, whereby the thickness M2 on the other surface 10B side of the insert 4 and the thickness M3 on the one surface 50A side of the insert 5 are overlapped. Can be overlapped with each other in the thickness direction of the insert portion 3. That is, the reamer 1 can make the thickness L3 of the insert portion 3 shorter than the distance obtained by adding the thickness L1 of the insert 4 (see FIG. 4) and the thickness L2 of the insert 5 (see FIG. 7). For example, when the thickness of the insert 4 is 5 mm and the thickness of the insert 5 is 4 mm, the total thickness of the single pieces of the inserts 4 and 5 is 9 mm, while the total thickness in the stacked state is 8 mm. In this case, the length in which the inserts 4 and 5 overlap each other in the thickness direction is 1 mm. Thereby, since the reamer 1 can shorten the protrusion length in the axial direction of the insert part 3, the rigidity of the insert part 3 can be improved. Furthermore, since the rigidity of the insert part 3 can be improved, the shake | fluctuation produced at the time of rotation of the reamer 1 can be suppressed.

  Moreover, as mentioned above, although the front-end | tip part of the convex parts 21-28 of the other surface 10B of the insert 4 contact | abuts with the bottom part of the recessed parts 71-78 of 50 A of one surface of the insert 5, respectively, the convex part 61-on the insert 5 side. The tip of 68 does not contact the bottom of the recesses 31 to 38 of the insert 4. This is because the height of the convex portions 61 to 68 of the insert 5 is lower than the depth of the concave portions 31 to 38 of the insert 4. The height of the convex portion is a difference in height from the concave portion, and is the length from the bottom of the concave portion to the tip portion of the convex portion. The depth of the concave portion is a height difference from the convex portion, and is a length from the tip portion of the convex portion to the bottom portion of the concave portion. Thereby, the insert part 3 can superimpose the inserts 4 and 5 in parallel with each other without deviation.

  With reference to FIG. 10, FIG. 11, the arrangement | positioning conditions of the convex part and recessed part in an insert are demonstrated. The convex portions and the concave portions provided on the mating surfaces of the inserts 4 and 5 shown in FIG. 8 can be overlapped with each other even if one or both of the inserts 4 and 5 are turned over. For that purpose, it is necessary to arrange | position the convex part and recessed part which are provided in both surfaces of an insert according to the arrangement conditions mentioned later. Therefore, the arrangement conditions of the convex portion and the concave portion will be described by taking the insert 130 shown in FIGS. 10 and 11 as an example. FIG. 10 is a side view of the insert 130 of FIG. 11 when viewed from the direction of the arrow D5.

  The insert 130 includes a disc-shaped insert body 140. 10 and 11, the blade portion, shaft hole, and insertion hole provided in the insert 130 are omitted. The insert main body 140 includes one surface 140A and the other surface 140B. The surface shape of the one surface 140A and the other surface 140B is the same.

  As shown in FIG. 11, on one surface 140A, five convex portions 141 to 145 and five concave portions 151 to 155 are alternately arranged so as to surround the center O in the clockwise direction. Next, virtual straight lines A1 and A2 that contact the outermost peripheral edge portions on both sides in the circumferential direction of the convex portion 141 from the center O are drawn, and the minimum angle when all the convex portions 141 are included between these virtual straight lines A1 and A2 is X1. And Then, similarly to the convex portion 141, the minimum angle of the two virtual straight lines that respectively contact the outermost peripheral edge portion of the convex portion 142 is X2, and the two virtual straight lines that respectively contact the outermost peripheral edge portion of the convex portion 143 are The minimum angle is X3, the minimum angle of the two virtual straight lines that are in contact with the outermost peripheral edge of the convex portion 144 is X4, and the minimum angle of the two virtual straight lines that are in contact with the outermost peripheral edge of the convex portion 145 is X5. And In addition, as long as each shape of the convex parts 141-145 is between two virtual straight lines, what kind of shape may be sufficient as it.

  Furthermore, the two virtual straight lines B1 and B2 that are in contact with the outermost peripheral edge portions on both sides in the circumferential direction of the concave portion 151 from the center O are drawn, and the maximum angle when the convex portion is not included between the virtual straight lines B1 and B2 is determined. Let Y1. Similarly to the concave portion 151, the maximum angle when the convex portion is not included between the two virtual straight lines that respectively contact the outermost peripheral edge portion of the concave portion 152 is Y2, and the two that contact the outermost peripheral edge portion of the concave portion 153 respectively. Y3 is the maximum angle when no convex portion is included between the virtual straight lines, and Y4 is the maximum angle when the convex portion is not included between the two virtual straight lines contacting the outermost peripheral edge of the concave portion 154, respectively. The maximum angle when no convex portion is included between two virtual straight lines that respectively contact the outermost peripheral edge portion of 155 is Y5.

When two inserts 130 having such a convex part and a concave part on both sides are overlapped with each other to constitute the insert part 3, in order to be able to overlap with the other even if one is turned over, the following five It is necessary to satisfy the conditions.
(1) All of X1 to X5 are smaller than Y1 to Y5 (2) The sum of X1 to X5 of each of the convex portions 141 to 145 is less than 180 ° (3) The sum of Y1 to Y5 of each of the concave portions 151 to 155 is the maximum angle _{X max} of greater than 180 ° (4) X1 to X5 is greater than 180/5 ° maximum angle _{Y max} of less than 180/5 ° (5) Y1~Y5

  Further, when X1 + Y1, X2 + Y2, X3 + Y3, X4 + Y4, and X5 + Y5 are all equal to 360/5 °, equal division is performed. In this case, the convex portions 141 to 145 and the concave portions 151 to 155 provided on the mating surface of one insert 130 are in contrast to the concave portions 151 to 155 and the convex portions 141 to 145 provided on the mating surface of the other insert 130. , Can be superposed at any position without interference. Note that the inserts 4 and 5 of the present embodiment satisfy both the above arrangement conditions. Therefore, in the insert portion 3, even if one or both of the inserts 4 and 5 are turned upside down, they can be overlapped with each other, and the convex portions and the concave portions provided on both surfaces can be overlapped at any position without interference. .

  The shape of the mounting surface 90 of the body 2A will be described with reference to FIGS. The body 2A includes a circular mounting surface 90 at the tip. The insert 5 (see FIGS. 5 and 6) can be detachably attached to the attachment surface 90. The mounting surface 90 is provided with a boss 111 and four screw holes 113 to 116 respectively. The boss 111 is provided at the center of the mounting surface 90 and is formed in a substantially cylindrical shape extending along the axis of the body 2A. The four screw holes 113 to 116 are arranged in the cross direction around the boss 111, and are arranged in order clockwise. Four screws 8 (see FIG. 1) are fastened to these screw holes 113 to 116.

  The attachment surface 90 has an uneven shape corresponding to the uneven shape on both surfaces of the insert 5. The mounting surface 90 is provided with eight substantially fan-shaped convex portions 91 to 98, eight substantially fan-shaped concave portions 101 to 108, and an annular concave portion 109, respectively. The convex portion 91 is provided in the center between the screw holes 113 and 116 so as to protrude in parallel to the axial direction of the body 2A, and is tapered from the outer peripheral edge portion of the mounting surface 90 toward the boss 111 side. Yes. The projecting portion 92 is provided between the screw hole 113 and the outer peripheral edge portion so as to protrude in parallel to the axial direction of the body 2 </ b> A, and is tapered from the outer peripheral edge portion toward the screw hole 113.

  Similarly to the convex portion 91, the convex portion 93 is at the center between the screw holes 113 and 114, the convex portion 95 is at the center between the screw holes 114 and 115, and the convex portion 97 is between the screw holes 115 and 116. Are provided so as to protrude in parallel to the axial direction of the body 2A and are respectively tapered from the outer peripheral edge of the mounting surface 90 toward the boss 111 side. Similarly to the convex portion 92, the convex portion 94 is between the screw hole 114 and the outer peripheral edge portion, the convex portion 96 is between the screw hole 115 and the outer peripheral edge portion, and the convex portion 98 is outside the screw hole 116 and the outer peripheral edge portion. It is provided between the peripheral edge so as to protrude parallel to the axial direction of the body 2A, and is tapered from the outer peripheral edge of the mounting surface 90 toward the screw holes 114, 115, and 116, respectively.

  On the other hand, the concave portions 101 to 108 are provided between the convex portions 91 to 98, and are formed lower on the rear end side in the axial direction than the convex portions 91 to 98 in the axial direction of the body 2A. The concave portion 101 is provided between the convex portions 91 and 92 and is tapered from the outer peripheral edge portion of the mounting surface 90 toward the boss 111 side. Similarly to the concave portion 101, the concave portion 102 is provided between the convex portions 92 and 93, the concave portion 103 is provided between the convex portions 93 and 94, and the concave portion 104 is provided between the convex portions 94 and 95. The concave portion 105 is provided between the convex portions 95 and 96, the concave portion 106 is provided between the convex portions 96 and 97, the concave portion 107 is provided between the convex portions 97 and 98, and the concave portion 108. Are provided between the convex portions 98 and 91 and are respectively tapered from the outer peripheral edge portion of the mounting surface 90 toward the boss 111 side.

  The annular recess 109 is annularly provided along the outer periphery of the boss 111 and is connected to the end of each of the recesses 101 to 108 on the boss 111 side. The annular recess 109 is formed lower than the recesses 101 to 108 in the axial direction of the body 2A. And the convex parts 91-98 and the recessed parts 101-108 of the attachment surface 90 also satisfy | fill the arrangement | positioning conditions of said convex part and a recessed part.

  A method for attaching the insert portion 3 to the body 2A will be described with reference to FIGS. Here, a method of attaching the insert portion 3 to the body 2A will be described for the purpose of creating the reamer 1 shown in FIG. As described above, the insert 2 can be attached to the body 2A. Therefore, the other surface 50B side of the insert 5 in the insert portion 3 is opposed to the mounting surface 90 of the body 2A. Next, the boss 111 of the mounting surface 90 is inserted in the order of the shaft hole 81 of the insert 5 and the shaft hole 41 of the insert 4. Then, the other surface 50 </ b> B of the insert 5 is overlapped with the mounting surface 90. At this time, the other surface 50B and the mounting surface 90 become a mating surface.

  In FIG. 16, the attachment surface 90 of the body 2A is indicated by a solid line, and the insert 5 is indicated by a two-dot chain line. As shown in FIG. 16, the convex portion 61 provided on the other surface 50 </ b> B of the insert 5 is inserted into the concave portion 101 provided on the mounting surface 90. The convex portion 62 provided on the other surface 50 </ b> B is inserted into the concave portion 102 provided on the attachment surface 90. The convex portion 63 provided on the other surface 50B is inserted into the concave portion 103 provided on the mounting surface 90. The convex portion 64 provided on the other surface 50 </ b> B is inserted into the concave portion 104 provided on the attachment surface 90. The convex portion 65 provided on the other surface 50B is inserted into the concave portion 105 provided on the mounting surface 90. The convex portion 66 provided on the other surface 50B is inserted into the concave portion 106 provided on the mounting surface 90. The convex portion 67 provided on the other surface 50 </ b> B is inserted into the concave portion 107 provided on the attachment surface 90. The convex portion 68 provided on the other surface 50 </ b> B is inserted into the concave portion 108 provided on the attachment surface 90.

  On the other hand, the convex portion 91 provided on the mounting surface 90 is inserted into the concave portion 78 provided on the other surface 50B. The convex portion 92 provided on the attachment surface 90 is inserted into the concave portion 71 provided on the other surface 50B. The convex portion 93 provided on the attachment surface 90 is inserted into the concave portion 72 provided on the other surface 50B. The convex portion 94 provided on the attachment surface 90 is inserted into the concave portion 73 provided on the other surface 50B. The convex portion 95 provided on the attachment surface 90 is inserted into the concave portion 74 provided on the other surface 50B. The convex portion 96 provided on the attachment surface 90 is inserted into the concave portion 75 provided on the other surface 50B. The convex portion 97 provided on the attachment surface 90 is inserted into the concave portion 76 provided on the other surface 50B. The convex portion 98 provided on the attachment surface 90 is inserted into the concave portion 77 provided on the other surface 50B.

  Next, four screws 8 are respectively inserted into the insertion holes 43 to 46 of the insert 4 and the insertion holes 83 to 86 of the insert 5, and fastened to the screw holes 113 to 116 of the mounting surface 90, respectively. In this way, the insert portion 3 is fixed to the mounting surface 90 of the body 2A, and the reamer 1 is configured.

  Here, as shown in FIG. 16, in a state where the other surface 50B of the insert 5 is attached to the attachment surface 90 of the body 2A, the tip of the convex portion 91 provided on the attachment surface 90 is provided on the other surface 50B. It contacts the bottom of the recessed portion 78 formed. The tip of the convex portion 92 provided on the mounting surface 90 comes into contact with the bottom of the concave portion 71 provided on the other surface 50B. The tip of the convex portion 93 provided on the mounting surface 90 comes into contact with the bottom of the concave portion 72 provided on the other surface 50B. The tip of the convex portion 94 provided on the mounting surface 90 comes into contact with the bottom of the concave portion 73 provided on the other surface 50B. The tip of the convex portion 95 provided on the attachment surface 90 comes into contact with the bottom of the concave portion 74 provided on the other surface 50B. The tip of the convex portion 96 provided on the mounting surface 90 comes into contact with the bottom of the concave portion 75 provided on the other surface 50B. The tip of the convex portion 97 provided on the mounting surface 90 comes into contact with the bottom of the concave portion 76 provided on the other surface 50B. The tip of the convex portion 98 provided on the attachment surface 90 comes into contact with the bottom of the concave portion 77 provided on the other surface 50B.

  On the other hand, the tip of the convex portion 61 provided on the other surface 50 </ b> B faces the bottom of the concave portion 101 provided on the mounting surface 90 with a gap. The front end portion of the convex portion 62 provided on the other surface 50B faces the bottom portion of the concave portion 102 provided on the mounting surface 90 with a gap. The tip of the convex portion 63 provided on the other surface 50B faces the bottom of the concave portion 103 provided on the mounting surface 90 with a gap. The tip of the convex portion 64 provided on the other surface 50B faces the bottom of the concave portion 104 provided on the mounting surface 90 with a gap. The tip of the convex portion 65 provided on the other surface 50B faces the bottom of the concave portion 105 provided on the mounting surface 90 with a gap. The tip of the convex portion 66 provided on the other surface 50B faces the bottom of the concave portion 106 provided on the mounting surface 90 with a gap. The tip of the convex portion 67 provided on the other surface 50 </ b> B faces the bottom of the concave portion 107 provided on the mounting surface 90 with a gap. The tip of the convex portion 68 provided on the other surface 50B faces the bottom of the concave portion 108 provided on the mounting surface 90 with a gap.

  As described above, the convex portions and the concave portions of the attachment surface 90 and the other surface 50B are overlapped with each other, so that the distal end portion of the body 2A and the thickness M4 on the other surface 50B side of the insert 5 are aligned with each other. Can overlap each other in the direction. Thereby, the reamer 1 can further shorten the protruding length in the axial direction of the insert portion 3.

  Further, as described above, the convex portions 91 to 98 on the mounting surface 90 side abut on the concave portions 71 to 78 on the insert 5 side, respectively, while the convex portions 61 to 68 on the insert 5 side are concave portions on the mounting surface 90 side. It does not contact 101-108. Thereby, since the insert 5 can be piled up parallel to the mounting surface 90 without deviation, the insert portion 3 can be mounted orthogonally to the body 2A.

  The shape of the mounting surface 190 of the body 2B will be described with reference to FIGS. The body 2B includes a circular attachment surface 190 at the tip. The insert 4 (see FIGS. 2 and 3) can be attached to the attachment surface 190. The mounting surface 190 is provided with a boss 211 and four screw holes 213 to 216. The boss 211 is provided at the center of the mounting surface 190 and is formed in a substantially columnar shape extending along the axis of the body 2B. The four screw holes 213 to 216 are respectively arranged in the cross direction around the boss 211 and are sequentially arranged clockwise. Four screws 8 (see FIG. 1) are fastened to these screw holes 213 to 216.

  The mounting surface 190 has an uneven shape corresponding to the uneven shape on both sides of the insert 4. The mounting surface 190 is provided with eight substantially fan-shaped convex portions 191 to 198, eight substantially fan-shaped concave portions 201 to 208, and an annular concave portion 209, respectively. The convex portions 191 and 192 are provided so as to sandwich the screw hole 213 from both sides in the circumferential direction. The convex portions 193 and 194 are provided so as to sandwich the screw hole 214 from both sides in the circumferential direction. The convex portions 195 and 196 are provided so as to sandwich the screw hole 215 from both sides in the circumferential direction. The convex portions 197 and 198 are provided so as to sandwich the screw hole 216 from both sides in the circumferential direction. These convex portions 191 to 198 are provided so as to protrude parallel to the axial direction of the body 2A, and are respectively tapered from the outer peripheral edge portion of the mounting surface 190 toward the boss 111 side.

  On the other hand, the concave portions 201 to 208 are provided between the convex portions 191 to 198, and are formed lower in the axial direction rear end side than the convex portions 191 to 198 in the axial direction of the body 2B. The concave portion 201 is provided between the convex portions 191 and 192, the concave portion 202 is provided between the convex portions 192 and 193, the concave portion 203 is provided between the convex portions 193 and 194, and the concave portion 204 is convex. The concave portion 205 is provided between the convex portions 195 and 196, the concave portion 206 is provided between the convex portions 196 and 197, and the concave portion 207 is provided between the convex portions 197 and 198. The recess 208 is provided between the protrusions 198 and 191 and is tapered from the outer peripheral edge of the mounting surface 190 toward the boss 211. The screw hole 213 is provided on the boss 211 side of the recess 201, the screw hole 214 is provided on the boss 211 side of the recess 203, the screw hole 215 is provided on the boss 211 side of the recess 205, and the screw hole 216 is It is provided on the boss 211 side of the recess 207.

  The annular recess 209 is provided in an annular shape along the outer periphery of the boss 211 and is connected to the end of each of the recesses 201 to 208 on the boss 211 side. The annular recess 209 is formed lower on the rear end side in the axial direction than the recesses 201 to 208 in the axial direction of the body 2B. The convex portions 191 to 198 and the concave portions 201 to 208 of the mounting surface 190 also satisfy the above-described arrangement conditions of the convex portions and the concave portions.

  With reference to FIG. 17, the method to attach the insert part 3 with respect to the body 2B is demonstrated. Here, a method of attaching the insert portion 3 to the body 2B will be described for the purpose of creating a reamer (not shown) in which the combination order (positional relationship) of the inserts 4 and 5 is opposite to that of the reamer 1. As described above, the insert 2 can be attached to the body 2B. Therefore, the other surface 10B side of the insert 4 in the insert portion 3 is opposed to the mounting surface 190 of the body 2B. Next, the boss 211 of the mounting surface 190 is inserted in the order of the shaft hole 41 of the insert 4 and the shaft hole 81 of the insert 5. Then, the other surface 10 </ b> B of the insert 4 is overlapped with the mounting surface 190. At this time, the other surface 10B and the mounting surface 190 become a mating surface.

  In FIG. 17, the attachment surface 190 of the body 2B is indicated by a solid line, and the insert 4 is indicated by a two-dot chain line. The convex portion 21 provided on the other surface 10B of the insert 4 is inserted into the concave portion 208 provided on the mounting surface 190. The convex portion 22 provided on the other surface 10B is inserted into the concave portion 201 provided on the mounting surface 190. The convex portion 23 provided on the other surface 10B is inserted into the concave portion 202 provided on the mounting surface 190. The convex portion 24 provided on the other surface 10B is inserted into the concave portion 203 provided on the mounting surface 190. The convex portion 25 provided on the other surface 10B is inserted into the concave portion 204 provided on the mounting surface 190. The convex portion 26 provided on the other surface 10B is inserted into the concave portion 205 provided on the mounting surface 190. The convex portion 27 provided on the other surface 10B is inserted into the concave portion 206 provided on the attachment surface 190. The convex portion 28 provided on the other surface 10B is inserted into the concave portion 207 provided on the mounting surface 190.

  On the other hand, the convex portion 191 provided on the mounting surface 190 is inserted into the concave portion 31 provided on the other surface 10B of the insert 4. The convex portion 192 provided on the attachment surface 190 is inserted into the concave portion 32 provided on the other surface 10B. The convex portion 193 provided on the attachment surface 190 is inserted into the concave portion 33 provided on the other surface 10B. The convex portion 194 provided on the mounting surface 190 is inserted into the concave portion 34 provided on the other surface 10B. The convex portion 195 provided on the attachment surface 190 is inserted into the concave portion 35 provided on the other surface 10B. The convex portion 196 provided on the attachment surface 190 is inserted into the concave portion 36 provided on the other surface 10B. The convex portion 197 provided on the attachment surface 190 is inserted into the concave portion 37 provided on the other surface 10B. The convex portion 198 provided on the attachment surface 190 is inserted into the concave portion 38 provided on the other surface 10B.

  Next, four screws 8 are respectively inserted into the insertion holes 83 to 86 of the insert 5 and the insertion holes 43 to 46 of the insert 4, and fastened to the screw holes 213 to 216 of the mounting surface 190, respectively. In this way, the insert portion 3 is fixed to the mounting surface 190 of the body 2B, and a reamer is configured.

  Then, the convex portions and the concave portions of the mounting surface 190 and the other surface 10B are overlapped with each other, so that the distal end portion of the body 2B and the thickness M1 on the other surface 10B side of the insert 4 are mutually connected in the axial direction of the reamer. Can be stacked. Thereby, the reamer can further shorten the protruding length of the insert portion 3 in the axial direction.

  With reference to FIGS. 18-21, the usage method of the reamer 100,200 which comprised the insert part 3 by one insert is demonstrated. The insert part 3 can also be comprised with one insert. For example, the reamer 100 shown in FIG. 18 comprises the insert part 3 with one insert 5. The insert 5 is attached to the attachment surface 190 of the body 2A. In the reamer 100, the other surface 50B side (see FIG. 7) of the insert 5 is attached to the attachment surface 190 of the body 2B so that the right blade is twisted to the right. On the other hand, a reamer 200 shown in FIG. 19 is obtained by turning over the insert 5 that is a right-handed right-handed twist in the reamer 100 and attaching it to the attachment surface 190 of the body 2B. Thereby, the reamer 200 can be left-handed and right-handed. That is, in the reamers 100 and 200, the chip discharge direction is reversed, and can be properly used as follows according to the type of hole to be processed. 18 and 19, four screws for attaching the insert 5 to the body 2A are omitted.

  For example, as shown in FIG. 20, when processing a blind hole 6 </ b> A having a bottom, an operator may use a reamer 100. Since the reamer 100 is a right-handed right-handed twist, the rotation direction of the tool during cutting is clockwise when viewed from the body 2A side (see FIG. 18). The reamer 100 discharges chips in the reverse direction, that is, the body 2A side with respect to the moving direction of the tool during cutting. Thereby, the reamer 100 can make it difficult for chips to accumulate on the bottom of the blind hole 6A during cutting.

  On the other hand, as shown in FIG. 21, when processing the through-hole 6B without a bottom, the operator may use a reamer 200. Since the reamer 200 is a left blade right-handed twist, the rotation direction of the tool at the time of cutting is counterclockwise when viewed from the body 2A side, and is opposite to the reamer 100 (see FIG. 19). The reamer 200 discharges chips in the same direction as the movement direction of the tool during cutting, that is, chips on the tip side of the tool. Thereby, the reamer 200 can make it difficult to receive the influence of chips during cutting.

  Thus, by properly using the reamers 100 and 200 according to the type of the hole to be processed, the hole can be satisfactorily processed without being affected by the chips. In the present embodiment, for example, the two types of reamers 100 and 200 can be configured only by changing the direction in which the insert 5 is attached to the body 2A, so that the part cost can be reduced. In the present embodiment, the example in which the insert portion 3 is configured by the single insert 5 has been described. However, the insert portion 3 may be configured by the single insert 4.

  In the above description, the mounting surfaces 90 and 190 of the bodies 2A and 2B correspond to the “contact surface” of the present invention, the virtual straight lines A1 and A2 correspond to the “first virtual straight line” of the present invention, and the virtual straight lines B1 and B2 Corresponds to the “second virtual straight line” of the present invention.

  As described above, the reamer 1 according to this embodiment includes the body 2A, the insert portion 3, and the four screws 8. The screw 8 removably fixes the insert portion 3 to the distal end portion of the body 2A. The insert part 3 is configured by overlapping disk-shaped inserts 4 and 5 coaxially with each other. The insert 4 includes convex portions 21 to 28 and concave portions 31 to 38 on both sides. The convex portions 21 to 28 are formed so as to protrude from the center in the thickness direction of the insert 4 to both sides in the thickness direction, and are the most spaced apart from the center. The concave portions 31 to 38 are provided in portions excluding the convex portions 21 to 28 and are lower than the convex portions 21 to 28. The insert 5 also includes convex portions 61 to 68 and concave portions 71 to 78 on both sides. The convex portions 61 to 68 are formed so as to protrude from the center in the thickness direction of the insert 5 to both sides in the thickness direction, and are the most spaced apart from the center. The concave portions 71 to 78 are provided in portions excluding the convex portions 61 to 68 and are lower than the convex portions 61 to 68. When the inserts 4 and 5 are overlapped with each other, the convex portions 21 to 28 provided on the mating surface of the insert 4 are inserted into any of the concave portions 71 to 78 provided on the mating surface of the insert 5. The convex portions 61 to 68 provided on the mating surface of the insert 5 are inserted into any of the concave portions 31 to 38 provided on the mating surface of the insert 4.

  Therefore, since the reamer 1 can configure the insert portion 3 by combining the inserts 4 and 5 having different uses, the workpiece can be combined. Moreover, since the kind of blade part can be changed by changing the combination of inserts, the variation of compound processing can be expanded. In addition, since the inserts 4 and 5 in the insert portion 3 partially overlap each other in the thickness direction, the thickness of the insert portion 3 is smaller than the total thickness of the inserts 4 and 5 as a single unit. Therefore, since the reamer 1 can shorten the protruding length of the insert portion 3, the reamer 1 can improve the tool rigidity and can suppress the deflection that occurs during rotation.

  Moreover, in the said embodiment, the convex parts 21-28 provided in the insert 4 are provided between the blade parts 11-18 and the shaft hole 41 of the insert 4. FIG. That is, the thick convex portions 21 to 28 of the insert 4 are respectively arranged corresponding to the blade portions 11 to 18. Thereby, the reamer 1 can improve the rigidity of the outer peripheral part of the insert 4 which supports the blade parts 11-18.

  Moreover, in the said embodiment, the axial hole 81 penetrated in the thickness direction is provided in the center part of the insert 5, for example. On the other hand, a mounting surface 90 that comes into contact with one surface of the insert 5 is provided at the tip of the body 2A, and the center of the mounting surface 90 projects along the axial direction of the body 2A and is inserted into the shaft hole 41. A boss 111 is provided. For example, when the insert 5 is fixed to the mounting surface 90 of the body 2A, the boss 111 on the body 2A side is inserted into the shaft hole 81 of the insert 5 and one side of the insert 5 is in contact with the mounting surface 90 on the body 2A side. Then, the four screws 8 are used for fixing. Thereby, since the reamer 1 can position the insert 5 easily with respect to the front-end | tip part of the body 2A, the attachment operation | work of the insert 5 with respect to the body 2A can be performed efficiently.

  Moreover, in the said embodiment, the convex part 91-98 and the recessed part 101-108 are also provided in the attachment surface 90, respectively. The convex portions 91 to 98 are provided at positions corresponding to the concave portions 71 to 78 provided on one surface of the insert 5. The concave portions 101 to 108 are provided at positions corresponding to the convex portions 61 to 68 provided on the insert 5. When one surface of the insert 5 is brought into contact with the mounting surface 90, the convex portions 61 to 68 provided on one surface of the insert 5 are inserted into any of the concave portions 101 to 108 provided on the mounting surface 90. Therefore, the reamer 1 can further shorten the protruding length of the insert portion 3.

  In the above embodiment, the insert 5 is provided with four insertion holes 83 to 86, and screw holes 113 to 116 are provided at positions corresponding to the insertion holes 83 to 86 on the mounting surface 90. Yes. Therefore, by inserting the four screws 8 into the four insertion holes 83 to 86 and fastening them to the screw holes 113 to 116 of the mounting surface 90, the reamer 1 makes the insert 5 strong against the body 2 </ b> A. Can be fixed.

Moreover, in the said embodiment, in each of both surfaces of the insert which comprises the insert part 3, the number of convex parts and the number of recessed parts are the same n pieces, and it contacts with the outermost peripheral part of a convex part from the center part of an insert. X is the minimum angle indicated by the two virtual straight lines when all the convex parts are included in between, and the convex part is included between the two second virtual straight lines that contact the outermost peripheral edge of the concave part from the central part. When the maximum angle when there is no is Y, the insert satisfies all of the following conditions.
(1) X <Y
(2) The total X of each of the n convex portions is less than 180 °.
(3) The total Y of each of the n concave portions is larger than 180 °.
(4) The maximum angle _Xmax is less than 180 / n among X of each of the n convex portions.
(5) The maximum angle Y _max is larger than 180 / n among Y of each of the n concave portions.
By satisfying all the above conditions, the convex portions and the concave portions provided on both sides of the insert can be superimposed on the concave portion and the convex portion of the other insert even if the insert is turned over. Furthermore, when X + Y adjacent to each other is 360/5, it is equally divided, so that the convex portion and the concave portion can overlap at any position without interference.

  Moreover, in the said embodiment, the convex parts 91-98 and the recessed parts 101-108 in the attachment surface 90 of the body 2A, and the convex parts 191-198 and the recessed parts 201-208 in the attachment surface 190 of the body 2B are the convex parts of the inserts 4 and 5. The arrangement conditions of the part and the concave part are satisfied. Thereby, the front and back of the insert 5 can be attached to the attachment surface 90 of the body 2A, and the back and front of the insert 4 can be attached to the attachment surface 190 of the body 2B. That is, since either the front or back of the insert can be attached to the body, for example, a right blade right-handed insert can be changed to a left blade right-handed twist. Accordingly, for example, whether the hole to be processed is a blind hole or a through hole, and the discharge direction of the chips can be freely changed, so that the processing can be performed satisfactorily without being affected by the chips.

  Moreover, in the said embodiment, although the front-end | tip part of the convex parts 21-28 provided in the mating surface of the insert 4 contact | abuts the bottom part of the recessed parts 71-78 provided in the mating surface of the insert 5, The tip portions of the convex portions 61 to 68 provided on the surface do not contact the bottom portions of the concave portions 31 to 38 provided on the mating surfaces of the insert 4. Thereby, the mating surface of the insert 4 and the mating surface of the insert 5 can be overlapped in parallel with each other without rattling. Thereby, the thickness of the insert part 3 comprised by overlapping several sheets can be made uniform.

  Moreover, in the said embodiment, the insert 5 is a roughing insert provided with the blade parts 51-58 for roughing, and the insert 4 is the insert for finishing processes provided with the blade parts 11-18 for finishing. It is. Therefore, by combining them to form the insert portion 3, the reamer 1 can perform combined machining that performs roughing and finishing simultaneously.

  It should be noted that the present invention is not limited to the specific configuration of the above embodiment. For example, the blade portions of the inserts 4 and 5 of the reamer 1 of the above embodiment are spirally twisted, but may be linear. Moreover, in the said embodiment, although the insert part 3 comprised by having piled up 1 sheet | seat or 2 sheets was demonstrated, you may comprise 3 sheet | seats or more.

  The number of insertion holes provided in each of the inserts 4 and 5 in the above embodiment is not limited to four, but a plurality of insertion holes are preferably provided so as to surround the shaft holes 41 and 81. In the above embodiment, the insert 4 or 5 is fixed to the mounting surfaces 90 and 190 of the bodies 2A and 2B with the four screws 8. However, the insert 4 or 5 may be detachably fixed by other means. . For example, the insert may be fixed to the body with a single bolt. Although not shown, in this type, the boss is projected from the shaft hole of the insert arranged on the mounting surface of the body, and the bolt shaft portion is fastened to the screw hole provided at the tip of the boss. Thereby, since the head part of a bolt engages with the surface on the opposite side to the surface which contacts the attachment surface of an insert, an insert can be fixed to the attachment surface of a body like the said embodiment.

  In the above embodiment, the number of convex portions and concave portions provided in each of the inserts 4 and 5 is eight, but the number is not limited as long as the number is the same.

  In the above embodiment, for example, as shown in FIG. 8, the tip portions of the convex portions 61 to 68 provided on the mating surface of the insert 5 are in contact with the bottoms of the concave portions 31 to 38 provided on the mating surface of the insert 4. Although it is made not to do, you may make it contact. On the contrary, the tips of the projections 61 to 68 provided on the mating surface of the insert 5 are brought into contact with the bottoms of the recesses 31 to 38 provided on the mating surface of the insert 4 to align the insert 4. You may make it the front-end | tip of the convex parts 21-28 provided in the surface not contact the bottom part of the recessed parts 71-78 provided in the mating surface of the insert 5. FIG.

  Moreover, as shown in FIG. 18, the front-end | tip part of the convex parts 61-68 provided in the other surface 50B of the insert 5 does not contact the bottom part of the recessed parts 101-108 provided in the attachment surface 90 of the body 2A. It may be contacted. Moreover, as shown in FIG. 19, the front-end | tip part of the convex parts 21-28 provided in the other surface 10B of the insert 4 is contacting the bottom part of the recessed parts 201-208 provided in the attachment surface 190 of the body 2B. However, you may make it not contact.

Claims (9)

A cylindrical body,
A disc-shaped insert,
A reamer comprising fixing means for detachably fixing the insert portion to one end portion in the axial direction of the body,
The insert part can be constituted by a single disk-like insert having a blade part provided with a right blade or a left blade torsional blade on the side surface, or a plurality of sheets stacked on the same axis. ,
The insert is on each side,
A protrusion that is formed to protrude from the center in the thickness direction of the insert to both sides in the thickness direction, and is the most spaced apart from the center;
Provided in a portion excluding the convex portion, formed to protrude from the center to both sides in the thickness direction, and provided with a concave portion lower than the convex portion,
When the plurality of inserts are coaxially overlapped with each other, on the mating surfaces of the first insert and the second insert that overlap each other,
The convex portion provided on the mating surface of the first insert is inserted into the concave portion provided on the mating surface of the second insert,
The reamer, wherein the convex portion provided on the mating surface of the second insert is inserted into the concave portion provided on the mating surface of the first insert. The reamer according to claim 1, wherein the convex portion is provided between the blade portion and a central portion of the insert. A shaft hole penetrating in the thickness direction is provided in the central portion of the insert,
The one end portion of the body is provided with a contact surface that contacts one side of the insert,
The reamer according to claim 2, wherein a boss that protrudes along the axial direction of the body and is inserted into the shaft hole is provided at the center of the contact surface. On the contact surface,
A body-side convex portion that protrudes from the one surface side and is inserted into the concave portion at a position corresponding to the concave portion provided on the one surface;
The body side recessed part which is provided lower than the body side convex part and inserts the convex part inside is provided at a position corresponding to the convex part provided on the one side. Item 4. The reamer according to item 3. The fixing means is a screw;
The insert is provided with an insertion hole for penetrating in the thickness direction and for inserting the shaft portion of the screw,
The reamer according to claim 4, wherein a screw hole for fastening the screw is provided at a position corresponding to the insertion hole on the contact surface. In each of both sides of the insert,
The number of the convex portions and the number of the concave portions are the same n,
The minimum angle indicated by the two first imaginary straight lines when contacting the outermost peripheral edge portion of the convex portion from the central portion and including all the convex portions therebetween is X, and the outermost portion of the concave portion from the central portion When the maximum angle when the convex portion is not included between the two second imaginary straight lines in contact with the peripheral portion is Y,
X <Y,
the sum of X of each of the n convex portions is less than 180 °;
the sum of each Y of the n recesses is greater than 180 °;
Of each of the n convex portions, the maximum angle X _max is less than 180 / n,
The insert-type tool according to claim 4 or 5, wherein a maximum angle Y _max is larger than 180 / n among Y of each of the n concave portions. The number of the body-side convex portions and the number of the body-side concave portions provided on the contact surface is n, which is the same as the number of the convex portions and the number of the concave portions,
The minimum angle indicated by two third imaginary straight lines when contacting the outermost peripheral edge portion of the body side convex portion from the center portion of the contact surface and including all the body side convex portions therebetween is x, the center When the maximum angle when the body side convex portion is not included between the two fourth imaginary straight lines coming into contact with the outermost peripheral edge portion of the body side concave portion from the portion is y,
The reamer according to claim 6, wherein x = X and y = Y. The tip of the convex portion provided on the mating surface of the first insert is in contact with the bottom of the concave portion provided on the mating surface of the second insert,
2. The tip of the convex portion provided on the mating surface of the second insert does not contact the bottom of the concave portion provided on the mating surface of the first insert. The reamer according to any one of 7 to 7. The insert part is
A roughing insert which is the insert provided with the blade for roughing;
The reamer according to any one of claims 1 to 8, wherein the insert for finishing, which is the insert having the blade for finishing, is overlapped on the same axis.

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